Abstract
Acute renal replacement therapy (RRT) requires a prescription outlining mode, target dose, type of anticoagulation, target fluid balance and measures of adequacy, however a formal dose prescription in acute RRT is often missing and effective delivery is not always measured. One potential reason for this omission is lack of consensus on the best way of measuring intensity of RRT and conflicting data related to the optimal dose. For continuous RRT (CRRT) dose is often expressed as the amount of dialysis/hemofiltration flow delivered to the patient in ml/kg per hour. Current international guidelines recommend delivering an effluent volume of 20–25 ml/kg/h for post dilution CRRT in AKI, taking into account the degree of ‘pre-dilution’ and ‘filter-down’ time. Based on the experience in patients with end stage renal disease (ESRD) it has been suggested that CRRT doses of <15 ml/kg/h are too low in critically ill patients, especially in the acute phases of illness. There is increasing evidence that fluid overload is detrimental to both renal outcome and survival in critically ill patients with AKI. It is not possible to recommend a general net ultrafiltration rate, instead the ultrafiltration rate should be tailored to the patients’ needs and haemodynamic and fluid status. The application of high-volume hemofiltration in severe sepsis and septic shock is not recommended based on the results of human studies. Also, there is increasing recognition that high dose CRRT increases drug clearance and may potentially lead to sub-therapeutic drug levels, including antibiotics, resulting in treatment failure.
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Bouman, C.S.C., Ostermann, M., Joannidis, M., Joannes-Boyau, O. (2015). Dose of Renal Replacement Therapy in AKI. In: Oudemans-van Straaten, H., Forni, L., Groeneveld, A., Bagshaw, S., Joannidis, M. (eds) Acute Nephrology for the Critical Care Physician. Springer, Cham. https://doi.org/10.1007/978-3-319-17389-4_13
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DOI: https://doi.org/10.1007/978-3-319-17389-4_13
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